CN209836076U - Continuous coking device - Google Patents
Continuous coking device Download PDFInfo
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- CN209836076U CN209836076U CN201920342513.9U CN201920342513U CN209836076U CN 209836076 U CN209836076 U CN 209836076U CN 201920342513 U CN201920342513 U CN 201920342513U CN 209836076 U CN209836076 U CN 209836076U
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- coal
- conveying
- briquette
- coking
- red coke
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- 238000004939 coking Methods 0.000 title claims abstract description 75
- 239000000571 coke Substances 0.000 claims abstract description 98
- 239000003245 coal Substances 0.000 claims abstract description 78
- 238000003860 storage Methods 0.000 claims abstract description 39
- 239000004484 Briquette Substances 0.000 claims abstract description 38
- 238000000746 purification Methods 0.000 claims abstract description 21
- 239000003034 coal gas Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims description 20
- 230000001174 ascending effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 28
- 238000000034 method Methods 0.000 description 23
- 206010022000 influenza Diseases 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000011068 loading method Methods 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
The utility model discloses a continuous coking device, which comprises a continuous coking furnace (18); the continuous coking furnace (18) is provided with a high-temperature resistant conveying device (9) in the furnace body and is used for conveying molded coal; a plurality of heating devices are arranged around the conveying surface along the conveying direction of the conveying device (9) to heat the briquettes on the conveying surface; a briquette storage tank (6) is arranged on the furnace body at the upper part of the operation front end of the conveying device (9), the upper part of the briquette storage tank (6) is communicated with a briquette buffer tank (5), and the briquette buffer tank (5) is communicated with a coal gas purification system and an emptying pipe through a pipeline and a fan; a red coke storage tank (13) is arranged on the furnace body at the lower part of the operation rear end of the conveying device (9), the lower part of the red coke storage tank (13) is communicated with a red coke buffer tank (14), and the red coke buffer tank (14) is communicated with a coal gas purification system and a blow-down pipe through a pipeline and a fan. The utility model has the characteristics of the coking is fast, the coking is even, the technology is reliable etc.
Description
Technical Field
The utility model belongs to the technical field of the coking, especially, continuous coking device.
Background
The prior coking industry generally adopts traditional chamber type coking equipment and process, the equipment and the process have the defects of long coking time, high dependence on coking coal with strong caking property, uneven coke quality at different positions of a carbonization chamber, unorganized discharge generated in the coke discharging process of the coke oven during coal charging due to intermittent production, difficulty in treatment and the like, and the production flow of the coke oven is complex and the four main vehicles are difficult to operate and maintain.
Under the increasingly severe environmental protection pressure in China, the problems that the traditional chamber coke oven cannot be continuously produced and generates inorganized emission are solved, the coking time is reduced, the coke quality uniformity is improved, and the dependence of the coking industry on the coking coal with strong caking property is reduced, so that the method is very necessary.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a continuous coking device with uniform coke quality.
In order to solve the technical problem, the utility model discloses the technical scheme that the device was taken is: which comprises a continuous coking furnace; the continuous coking furnace is provided with a high-temperature resistant conveying device in the furnace body and is used for conveying molded coal; a plurality of heating devices are arranged around the conveying surface along the conveying direction of the conveying device to heat the molded coal on the conveying surface; a briquette storage tank is arranged on the furnace body at the upper part of the operation front end of the conveying device, the upper part of the briquette storage tank is communicated with a briquette buffer tank, and the briquette buffer tank is communicated with a gas purification system and a blow-down pipe through a pipeline and a fan; the furnace body at the lower part of the operation rear end of the conveying device is provided with a red coke storage tank, the lower part of the red coke storage tank is communicated with a red coke buffer tank, and the red coke buffer tank is communicated with a coal gas purification system and an emptying pipe through a pipeline and a fan.
The utility model discloses the device heating device is the burning flame path, and combustible gas burns in the burning flame path and heats.
The device the heating device is evenly arranged on the upper part and the lower part of the conveying surface.
The device of the utility model is provided with a coal gas ascending pipe on the furnace body of the continuous coking furnace, and the coal gas ascending pipe is communicated with a coal gas purification system.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the utility model solves the problems that the coking time of the traditional chamber coking process is long, the dependence on coking coal with strong caking property is high, the coke quality at different positions of the coking chamber is uneven, the disorganized discharge is generated in the coke discharging process of the coke oven coal loading and is difficult to control due to the intermittent production, the production flow of the coke oven is complicated, and the operation and maintenance of four trolleys are difficult; the method has the characteristics of high coking speed, uniform coking, continuous production, simple process, reliable technology and the like, and has popularization value.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the device comprises a pulverizer 1, a pressing machine 2, molded coal 3, a belt conveyor 4, a molded coal buffer tank 5, a molded coal storage tank 6, a fan 7, a long shaft distributor 8, a conveying device 9, a combustion flue 10, red coke 11, a coal gas riser 12, a red coke storage tank 13, a red coke buffer tank 14, a fan 15, a red coke tank 16, a heat exchanger 17 and a continuous coking furnace 18.
Detailed Description
The continuous coking device comprises a continuous coking furnace 18, a coal feeding device and a coke discharging device. The continuous coking furnace 18 comprises a furnace body which is arranged along the horizontal direction, and a high-temperature resistant conveying device 9 is arranged in the furnace body and used for horizontally conveying the molded coal from one end of the furnace body to the other end of the furnace body; the conveying device 9 is a transmission device of a chain conveyor. A plurality of heating devices are uniformly arranged on the upper part and the lower part of the surface of the conveying chain along the conveying direction of the conveying device 9 and used for heating the molded coal on the conveying chain to coke the molded coal; the heating devices are uniformly arranged on the upper part and the lower part of the surface of the conveying chain, so that the upper surface and the lower surface of the molded coal are heated, and the molded coal can be heated more uniformly and the temperature rise is more stable. The heating device is preferably a combustion flue 10, coal gas is combusted in the combustion flue 10 during heating, heat is indirectly transferred to the molded coal on the conveying device 9 through the furnace walls of the upper combustion flue and the lower combustion flue, the upper surface and the lower surface of the molded coal are heated, so that the temperature of the molded coal is gradually increased in the forward conveying process, and finally the molded coal is dried, softened, melted, cured, shrunk and matured to be finally converted into hot red coke. The upper and lower combustion flues 10 are arranged in pairs, and the upper and lower opposite combustion flues 10 are in pairs; the required number of combustion flame pairs is determined according to the length of the continuous coke oven 18. Each pair of combustion flues 10 are communicated with each other at the side surface of the inner cavity of the continuous coking furnace 18, so that each pair of combustion flues 10 forms a flue passage, one of the combustion flues inputs coal gas and high-temperature waste gas generated by combustion is output from the other combustion flue, and thus each pair of combustion flues 10 forms a complete heating cycle. The heating device can also adopt an electric heating device and other heating devices. The furnace body of the continuous coking furnace 18 is provided with a gas riser 12, the gas riser 12 is communicated with a gas purification system, and the pressure of coke oven gas separated out in the coking process of the molded coal in the continuous coking furnace 18 is controlled by an automatic instrument to be slightly higher than the atmospheric pressure, so that the explosion and fire caused by the rise of the oxygen content of the coke oven gas due to the leakage of air into the coke oven gas are prevented.
The coal feeding device of the continuous coking device comprises a briquette storage tank 6 and a briquette buffer tank 5. The coal storage tank 6 is positioned at the upper part of the running front end of the continuous coking furnace conveying device 9, penetrates through the furnace body and is fixed with the furnace body; the lower part of the coal storage tank 6 is provided with a long shaft distributing device 8 which is used for uniformly distributing the coal in the coal storage tank 6 on the upper surface of the running front end of the conveying device 8. The molded coal buffer tank 5 is positioned at the upper part of the molded coal storage tank 6, the upper end of the molded coal buffer tank 5 is provided with a charging opening and a charging valve, and the lower end of the molded coal buffer tank is provided with a discharging opening and a discharging valve; the briquette storage tank 6 is communicated with the discharge opening of the briquette buffer tank 5. The briquette buffer tank 5 is communicated with the coal gas purification system and the emptying pipe through a pipeline and a fan 7. The briquette of the coal feeding device is formed by pressing mixed coal, and the pressing equipment comprises a crusher 1 for crushing the mixed coal to a specified granularity, preferably a hammer crusher; a pressing machine 2 is arranged at the lower end of the outlet of the pulverizer and is used for cold-pressing or hot-pressing the blended coal into shaped coal; the pressed molded coal is conveyed to a charging hole of a molded coal buffer tank 5 by a belt conveyor 4.
The coke discharging device of the continuous coking device comprises a red coke storage tank 13, a red coke buffer tank 14 and a red coke tank 16. The red coke storage tank 13 is positioned at the lower part of the operation rear end of the continuous coking furnace conveying device 9, penetrates through the furnace body and is fixed with the furnace body; the molded coal is coked into red coke in the conveying process of the conveying device 9, and the red coke storage tank 13 is used for receiving the red coke conveyed by the conveying device 9; the lower end of the red coke storage tank 13 is provided with a discharge port and a discharge valve. The red coke buffer tank 14 is positioned at the lower part of the red coke storage tank 13 and is communicated with a discharge port of the red coke storage tank 13; the lower end of the red coke buffer tank 14 is provided with a discharge opening and a discharge valve. The red coke buffer tank 14 is communicated with the coal gas purification system and the emptying pipe through a pipeline and a fan 15, and the emptying pipe is provided with a heat exchanger 17. The red coke tank 16 is positioned at the lower part of the discharge opening of the red coke buffer tank 14 and is used for loading the red coke discharged from the red coke buffer tank 14.
The coking process of the continuous coking device is as follows: (1) pressing: the blended coal which is blended according to a certain proportion is crushed to a specified granularity by a crusher 1 and then is cold pressed or hot pressed by a press 2 to form the briquette 3. The pressed molded coal is conveyed to a molded coal buffer tank 5 by a belt conveyor 4.
(2) Coal feeding: after the molded coal buffer tank 5 is filled with molded coal, the molded coal buffer tank 5 is closed, and meanwhile, the fan 7 is started to pump out air in the molded coal buffer tank 5 and discharge the air into the atmosphere through the vent pipe; the purpose of negative pressure pumping is to eliminate air in the briquette buffer tank 5 and avoid oxygen in the air from mixing into the continuous coking furnace, which leads to the increase of oxygen content of coke furnace gas and causes explosion. When the pressure in the briquette buffer tank 5 reaches-50 +/-10 Pa (namely-40 Pa to-60 Pa), the air blower is stopped, the discharge valve of the briquette buffer tank 5 is opened at the same time, and after the pressure is equalized between the briquette buffer tank 5 and the briquette storage tank 6, the briquettes are all loaded into the briquette storage tank 6 by the dead weight. After all the molded coal in the molded coal buffer tank 5 is loaded into the molded coal storage tank 6, the discharge valve of the molded coal buffer tank 5 is closed, the fan 7 is started again, meanwhile, the pipeline valve of the fan 7 is switched from the vent pipe to the pipeline of the gas purification system, and the coke oven gas which enters the molded coal buffer tank 5 in a pressure equalizing mode is conveyed to the gas purification system for purification treatment. When the pressure in the briquette buffer tank 5 reaches-50 +/-10 Pa, the blower is stopped, the charging valve at the top of the briquette buffer tank 5 is opened, and after the briquette buffer tank 5 is equalized with the atmosphere, the pressed briquette is charged again.
(3) Continuous coking: the briquettes in the briquette storage tank 6 are uniformly distributed on the conveying device 9 through the long shaft distributor 8, are in a single-layer distribution state and are slowly conveyed forwards. In the conveying process, in the continuous coking furnace 18, the combustion flues 10 which are symmetrically arranged up and down along the conveying surface of the conveying device 9 are filled with coal gas and are combusted in the combustion flues 10, and the heat is indirectly transferred to the molded coal on the conveying device 9 through the furnace walls of the upper and lower flues; the upper and lower surfaces of the briquette are heated, so that the briquette is gradually heated in the forward conveying process, and the coking processes of drying, softening, melting, semicoke curing, shrinking and maturing are completed, and finally the briquette is changed into red coke 11. Introducing coke oven gas separated out in the coal briquette coking process into a gas purification system through a gas riser 12 for purification treatment, and controlling the pressure of the coke oven gas in the continuous coking furnace to be 140 +/-20 Pa through an automatic instrument; the pressure of the coke oven gas is slightly higher than the atmospheric pressure, so that the phenomenon that the oxygen content of the coke oven gas is increased to cause explosion and fire due to the leakage of air into the coke oven gas can be prevented. After the red coke reaches the coking final temperature of 1000 +/-50 ℃, the red coke is discharged into a red coke storage tank 13 through a conveying device.
(4) Discharging coke: after the red coke storage tank 13 is filled, the fan 15 is opened, air in the sealed red coke buffer tank 14 is pumped out, the hot air is cooled to normal temperature through the heat exchanger 17, and the hot air is discharged to the atmosphere through an emptying pipe; the purpose of negative pressure pumping is to eliminate the air in the red coke buffer tank 14, and to avoid oxygen in the air from mixing into the continuous coking furnace, which leads to the increase of the oxygen content of coke furnace gas and causes explosion, and because the red coke buffer tank stores the red coke air with higher temperature, the red coke air cannot be directly discharged, and therefore heat exchange and temperature reduction are needed. And when the pressure of the red coke buffer tank 14 reaches-50 +/-10 Pa, stopping the fan, simultaneously opening a discharge valve of the red coke storage tank 13, and after the pressure between the red coke storage tank 13 and the red coke buffer tank 14 is equalized, completely loading the red coke into the red coke buffer tank 14 through self weight. And closing the discharge valve of the red coke storage tank 13, starting the fan again, switching the pipeline valve of the fan from the emptying pipe to the pipeline of the gas purification system, and conveying the coke oven gas entering the red coke buffer tank 14 at the same pressure to the gas purification system for purification treatment. When the pressure of the red coke buffer tank 14 reaches minus 50 +/-10 Pa, stopping the fan, opening a discharge valve of the red coke buffer tank 14, and loading the red coke into the red coke tank 16 by self weight after the red coke buffer tank 14 is equalized with the atmosphere; after the red coke loading is completed, the red coke tank 16 is lifted to a dry quenching furnace for quenching coke.
(5) Coal gas recovery: the coke oven gas generated in the continuous coking process of the molded coal is concentrated by a gas riser 12 and then is conveyed into a gas purification system for purification treatment.
Example 1: the application of the present continuous coker is described below.
Mixing 12% gas coal, 10% lean coal, 10% anthracite, 18%1/3 coking coal, 10% fat coal, 36% coking coal and 4% asphalt binder, crushing, wherein the proportion of the size fraction less than or equal to 3mm is more than 90%, and cold-pressing by a press to form the briquette with the diameter of 60 mm. The molded coal is uniformly distributed on a conveying device (9) of the continuous coking furnace through a molded coal storage tank (6) and is in a single-layer distribution state; the molded coal is conveyed by a conveying device (9) along the conveying direction, the conveying speed of the conveying device is 3mm/s, the temperatures of combustion flame paths symmetrically arranged on the upper surface and the lower surface of the conveying device are controlled to be 1250 ℃ in the conveying process to heat the molded coal, so that the molded coal is gradually heated in the conveying process to finish the coking processes of drying, softening, melting, semicoke curing, shrinking and maturing, and finally becomes red coke; the coking time of the transfer of the briquette on the transfer device is 90 minutes, and the coking final temperature is finally 1000 ℃. The red coke is discharged through a red coke storage tank (13) and a red coke buffer tank (14). The data relating to this example and comparative conventional chamber coking example 1 are compared in tables 1 and 2 below.
Example 2: the application of the present continuous coker is described below.
Mixing 12% gas coal, 10% lean coal, 10% anthracite, 18%1/3 coking coal, 12% fat coal and 38% coking coal, crushing, wherein the proportion of the size fraction less than or equal to 3mm is more than 90%, and hot-pressing into 60 mm-diameter briquette by a press. The molded coal is uniformly distributed on a conveying device (9) of the continuous coking furnace through a molded coal storage tank (6) and is in a single-layer distribution state; the molded coal is conveyed by a conveying device (9) along the conveying direction, the conveying speed of the conveying device is 2.25mm/s, the temperatures of combustion flame paths symmetrically arranged on the upper surface and the lower surface of the conveying device are controlled to be 1150 ℃ in the conveying process to heat the molded coal, so that the molded coal is gradually heated in the conveying process, the coking processes of drying, softening, melting, semicoke curing, shrinking and maturing are completed, and finally the molded coal is changed into red coke; the coking time of the transfer of the briquette on the transfer device is 120 minutes, and the final coking temperature is finally 985 ℃. The red coke is discharged through a red coke storage tank (13) and a red coke buffer tank (14). The data relating to this example and comparative conventional chamber coking example 1 are compared in tables 1 and 2 below.
Table 1: the continuous coking device is adopted to be matched with the traditional coking strong bond coal
Table 2: the coking time and apparent mass of coke are compared with those of the traditional coking by adopting the continuous coking device
Claims (4)
1. A continuous coking unit, characterized by: it comprises a continuous coking furnace (18); the continuous coking furnace (18) is provided with a high-temperature resistant conveying device (9) in the furnace body and is used for conveying molded coal; a plurality of heating devices are arranged around the conveying surface along the conveying direction of the conveying device (9) to heat the briquettes on the conveying surface; a briquette storage tank (6) is arranged on the furnace body at the upper part of the operation front end of the conveying device (9), the upper part of the briquette storage tank (6) is communicated with a briquette buffer tank (5), and the briquette buffer tank (5) is communicated with a coal gas purification system and an emptying pipe through a pipeline and a fan; a red coke storage tank (13) is arranged on the furnace body at the lower part of the operation rear end of the conveying device (9), the lower part of the red coke storage tank (13) is communicated with a red coke buffer tank (14), and the red coke buffer tank (14) is communicated with a coal gas purification system and a blow-down pipe through a pipeline and a fan.
2. A continuous coking unit according to claim 1, characterized in that: the heating device is a combustion flame path (10), and combustible gas is combusted in the combustion flame path (10) to be heated.
3. A continuous coking unit according to claim 1, characterized in that: the heating devices are uniformly arranged above and below the conveying surface.
4. A continuous coking unit according to claim 1, 2 or 3, characterized in that: and a gas ascending pipe (12) is arranged on the furnace body of the continuous coking furnace, and the gas ascending pipe (12) is communicated with a gas purification system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342513.9U CN209836076U (en) | 2019-03-18 | 2019-03-18 | Continuous coking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342513.9U CN209836076U (en) | 2019-03-18 | 2019-03-18 | Continuous coking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209836076U true CN209836076U (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201920342513.9U Expired - Fee Related CN209836076U (en) | 2019-03-18 | 2019-03-18 | Continuous coking device |
Country Status (1)
| Country | Link |
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| CN (1) | CN209836076U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913244A (en) * | 2019-03-18 | 2019-06-21 | 唐山钢铁集团有限责任公司 | A kind of continuous coking device and technique |
| CN111876184A (en) * | 2020-07-10 | 2020-11-03 | 平顶山东方碳素股份有限公司 | System and method for intermittently preparing coke |
-
2019
- 2019-03-18 CN CN201920342513.9U patent/CN209836076U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913244A (en) * | 2019-03-18 | 2019-06-21 | 唐山钢铁集团有限责任公司 | A kind of continuous coking device and technique |
| CN111876184A (en) * | 2020-07-10 | 2020-11-03 | 平顶山东方碳素股份有限公司 | System and method for intermittently preparing coke |
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